Jvc-KSFX-922-R-Service-Manual(1) 电路图 维修手册.pdf

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1、Safety precaution- 1-2 1-3 1-4 1-11 1-15 Contents CASSETTE RECEIVER SERVICE MANUAL KS-FX922R No.49596 Feb. 2001 COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD. Area Suffix E. Continental Europe KS-FX922R KS-FX922R MO TP TP RDSRDS PTYPTY DISPDISP 891011127 DAB Location of main parts- Disassembly method

2、- Adjustment method - Description of major ICs - RadioFans.CN 收音机爱 好者资料库 KS-FX922R 1-11 Adjustment method 1.Digital osclloscope(100MHz) Measuring conditions(Amplifier section) Power supply voltage Load impedance Line out Standard volume position Balance and Bass,Treble volume .Fader :Center(Indicati

3、on0) Loudness,Dolby NR,Sound,Cruise:Off Volume position is about 2V at speaker output with following conditions.Playback the test tape VT721. AM mode 999kHz/62dB,INT/400Hz,30% modulation signal on receiving. FM mono mode 97.9MHz/66dB,INT/400Hz,22.5kHz deviation pilot off mono. FM stereo mode 1kHz,67

4、.5kHz dev. pilot7.5kHz dev. Output level 0dB(1 V,50 /open terminal). for DOLBY level measurement For playback frequency measurement For wow flutter & tape speed measurement For head azimuth measurement Cassette type for CTG-N (mechanism adjustment) DC14.4V(10.516V) 4 (2Speakers connection) 20k Tuner

5、 section BAND STEP FM : 100kHz (Seek), 50kHz (Manual) AM : 9kHz step DUMMY LOAD Exclusive dummy load should be used for AM and FM dummy load,there is a loss of 6dB between SSG output and antenna input. The loss of 6dB need not be considered since direct reading of figures are applied in this working

6、 standard. Arrangement of Adjusting Cassette Mechanism Section Preset Memory Initialization Preset Memory Band M1 M2 97.9 216 M3 603 M4 105.9 999 M5 108.0 1404 M6 87.5 1620 FM(MHz) AM(kHz) Azimuth screw (Forward side) Azimuth screw (Reverse side) Playback head Tape speed adjust Capstan motor Cassett

7、e mechanism (Surface) Test Instruments reqired for adjustment 2.Frequency Counter meter 3.Electric voltmeter 4.Wow & flutter meter 5.Test Tapes VT724 VT739 VT712 VT703 6.Torque gauge 87.5 153 89.9 RadioFans.CN 收音机爱 好者资料库 KS-FX922R 1-12 1 C401 C402 C403 C404 C405 C406 C407 C408 C409 C410 C411 C412 C4

8、13 C414 C415 C416 C417 C418 C419 CP401 CP402 CP403 D401 D402 D403 IC401 IC402 Q401 Q402 Q403 R401 R402 R403 R404 R405 R406 R407 R408 R409 R410 R411 R412 R413 R414 R415 R416 R417 R418 R419 R420 R421 R422 R423 R424 R425 VR402 VR401 B403 B415 B413 B407 B416 B406 B414 B405 B412 B404 B410 B402 B408 B401

9、B409 B411 1 11 21 1 17 1 2 E 1 1 FSMW1101A 31 TPP VR402:Rch (Dolby NR level adj) VR401:Rch (Dolby NR Frequency response adj) Arrangment of adjusting Head amplifier board section (Reverse side) Information for using a car audio service jig 1.Were advancing efforts to make our extension cords common f

10、or all car audio products. Please use this type of extension cord as follows. 2.As a U-shape type top cover is employed, this type of extension cord is needed to check operation of the mechanism assembly after disassembly. 3.Extension cord : EXTKSRT002-18P ( 18 pin extension cord ) For connection be

11、tween mechanism assembly and main board assembly. Check for mechanism driving section such as motor ,etc. Disassembly method 1.Remove the bottom cover. 2.Remove the front panel assembly. 3.Remove the top cover . 4.Install the front panel. 5.Confirm that current is being carried by connecting an exte

12、nsion cord jig. Note Available to connect to the CP701 connector when in- stalling the front panel. Cassette mechanism Front panel assembly EXTKSRT002-18P Extension cord Main boardMain board EXTKSRT002-18P to Main board to Cassette mechanism RadioFans.CN 收音机爱 好者资料库 KS-FX922R 1-13 Extension cord The

13、mechanism should be directly connected to the board using the extension wire. EXT-KSRT002-18P EXTKSRT002-18P Cassette mechanism to Main board to Cassette mechanism Front panel assembly Main boardMain board Extension cord EXTKSRT002-18P KS-FX922R 1-14 ItemConditionsAdjustment and Confirmation methods

14、S.ValuesAdjust Head azimuth adjustment Head height adjustment Adjust the azimuth directly. When you adjust the height using a mirror tape, remove the cassette housing from the mechanism chassis. After installing the cassette housing, perform the azimuth adjustment. Load the SCC-1659 mirror tape. Adj

15、ust with height adjustment screw A and azimuth adjustment screw B so that line A of the mirror tape runs in the center between Lch and Rch in the reverse play mode. After switching from REV to FWD then to REV, check that the head position set in procedure 1 is not changed. (If the position has shift

16、ed, adjust again and check.) Adjust with azimuth adjustment screw B so that line B of the mirror tape runs in the center between Lch and Rch in the forward play mode. Test tape: SCC-1659 VT703(10kHz) Test tape: VTT712 (3kHz) Test tape: VTT724 (1kHz) VTT739 (63Hz / 1kHz / 10kHz) 1. Tape speed and wow

17、 flutter confirmation 2. Play back frequency response confiramation 3. 1. 2. 3. Check to see if the reading of the F, counter / wow flutter meter is within 3015 3045(FWD / REV), and less than 0.35% (JIS RMS). In case of out of specification, adjust the motor with a built-in volume resistor. 1. 2. Pl

18、ay test tape VTT724, and set the volume position at 2V. Play test tape VTT739 and confirm. 1kHz / 10kHz: -1 3dB, 1kHz / 63Hz: 0 3dB, When 10kHz is out of specification, it will be necessary to read adjust the azimuth. 1. 2. 3. Load VTT724 (VT724) (1kHz) and play it back in the reverse play mode. Set

19、 the Rch output level to max. Load VTT703 (VT703) (10kHz) and play it back in the forward play mode. Adjust the Rch and Lch output levels to max, with azimuth adjustment screw B. In this case, the phase difference should be within 45 . Engage the reverse mode and adjust the output level to max, with

20、 azimuth adjustment screw C. (The phase difference should be 45 or more.) When switching between forward and reverse modes, the difference between channels should be within 3dB. (Between FWD L and R, REV L and R.) When VTT721 (VT721) (315Hz) is played back, the level difference between channels shou

21、ld be within 1.5dB. 1. 2. 3. 4. 5. Head azimuth adjustment Tape speed: 3015 3045Hz Wow flutter: less than 0.35% Speaker out 1kHz / 63Hz : 0 3db 1kHz / 10kHz : -1 3db Built-in volume resistor The tuner section is of an adjustment-freedesign. In case the tuner is in trouble, replace the tuner pack. A

22、line B line Head shield PBHead FWD Adj B REV Adj CHEIGHT Adj A phase (0 )(45 ) Head shield The head is at low position during. The head is at High position during REV. Output level: Maximum KS-FX922R Block Diagram IC801 CHANGER CONTROL HD74HC126FP-X HEAD IC401 PB EQ CXA2560Q IC301 POWER AMP. LA4743K

23、 IC161 E.VOLUME TEA6320T-X IC701 SYSTEM CONTROL MICON UPD178018AGC-603 TU1 AM/FM TUNER PACK QAU0222-001 SUB MOTOR IC402 DC MOTOR DRIVER LB1641 LCD1 QNZ0450-001 IC601 LCD DRIVER LC75873NW KEY S601 S619 MAIN MOTOR SWITCH TAPE END.STANDBY SEEK/STOP SD/ST SMETER JBUS SI JBUS SO JBUS I/O JBUS SCK SCK SI/

24、SO CD RCH CD LCH TUNER L/R OUT LR OUT RR OUT LF OUT RF L/R F L/R R FRONT L/R REAR L/R CP401 J801CP901J321 KEY 0 2 CJ601 LCDDA LCDCK LCDCE S1 S68 COM1 COM3 CN601 TAPE L/R F/R MODE STANDBY FF/REW MOTOR SUBMO TAPE IN DOLBY MS REEL SUBMO+ SUBMO- LCH RCH METAL DOLBY F/R MS LCH RCH FF/REW MOTOR TAPE IN MO

25、DE STANDBY TAPE END REEL CN401 CN403CN402 J1 AM FM TO CD CHANGER TO SPEAKER CONNECTORTO REAR LINE OUT Tuner.Power AMP.Changer/System ControllerLCD DRIVER/KEY SWITCH CIRCUT MECHANISM CONTROL IC602 REMOTE SENSOR RPM6938-SV4 REMOCON IC71 RDS DETECTOR SAA6579T-X COMP OUT RDSDA RDSCK 2-1 ABCDEFG 3 4 5 2

26、1 FM Radio Signal/Radio Main Signal Tape PB/Main Signal AM Radio Signal KS-FX922R ABCDEFG 3 4 5 2 1 Receiver & System control circuit section Standard schematic diagrams 2-3 KS-FX922R ABCDEFG 3 4 5 2 1 Mecha control circuit section Tape PB/Main Signal KS-FX922R 2-4 KS-FX922R ABCDEFG 3 4 5 2 1 LCD dr

27、iver & Operation switch circuit section 2-5 SERVICE MANUAL CASSETTE RECEIVER No.49631 Mar. 2001 COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD. KS-FX922R KS-FX922R Area Suffix EXCenteal Europe MO TP RDS PTY DISP TP RDS PTY DISP 891011127 DAB This model is KS-FX922RE EX that is added to the preceding mo

28、del, theKS-FX922R E . Therefore the service manual for this model is consisting of Parts list only. For others, please refer to the service manual of KS-FX922R E (issue No.49596). KS-FX922R VICTOR COMPANY OF JAPAN, LIMITED MOBILE ELECTRONICS DIVISION PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1Chome,Ohwatari-machi,Maebashi-city,371-8543,Japan (No.49631) 200103 E Qty EX Parts number Block No.M4MM ItenParts name A 2INST.BOOK (LANGUAGE) GET0017-002A (SPA,ITA,SWE,FIN) - Parts list(Accessories) 1 A P3-17